GeForce GTX 780 Ti vs Radeon HD 6770 1GB

Intro

Compare those specs to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory runs at a frequency of 1050 MHz on this particular card. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB		108 Watts
GeForce GTX 780 Ti		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

Performance-wise, the GeForce GTX 780 Ti should in theory be a lot superior to the Radeon HD 6770 1GB in general. (explain)

GeForce GTX 780 Ti		336000 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 268800 (400%)

Texel Rate

The GeForce GTX 780 Ti is a lot (more or less 483%) more effective at AF than the Radeon HD 6770 1GB. (explain)

GeForce GTX 780 Ti		210000 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 174000 (483%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 780 Ti is the winner, and very much so. (explain)

GeForce GTX 780 Ti		42000 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 27600 (192%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.